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1. Zone positioning;
2. Zone direction;
3. Zone size.

Setting up the detection zone is performed in the video frame with the help of a graphic tool.

If the zone is setup approximately, to scale the zone in the frame one should use a road marking or nearby objects (curbing, hatches etc.).
 

For zone's length accurate setup one should use cones, paint or other ways of the road marking .The distance between marks along the line should be 6 meters and zone's length should be correspondingly setup.
 

Zone's width and its cross position in respect of the line's center can be varied to diminish the effect of the traffic cross overlap, moving by the next lines. 

To provide the detector's algorithm efficient operation the zone size in the frame must occupy from 2 to 20 percent of the frame's area. If possible the detection zones have to be in that part of the frame, where the scale is greater (it is usually in the bottom).

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1. Go to the Vehicle detector object settings panel.
   
2. Click the Configuring detection... to set up the detector zone's positioning (1).
3. Frame selection dialog window will open in result.
   
4. Click Select frame to select a video frame.

5. Zone positioning setting dialog window will open in result.
   Image Modified
   Using the keyboard and a mouse set the zone detection parameters.

   Key	Function	Note
   Left mouse key	Transferring the zone's node point holding the pressed left mouse button	The node point is selected in the frame by a rectangle
   Mouse scrolling	Rotating the detection zone around its center	Mouse cursor should be within the detection zone
   Mouse scrolling + Alt	Step-by-step rotating the detection zone around its center	Mouse cursor should be within the detection zone
   Mouse scrolling + Ctrl	Zone scaling	Mouse cursor should be within the detection zone
   Mouse scrolling + Shift	Graded, in accordance with the sides of detection zone, change of its direction	Mouse cursor should be within the detection zone

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1. Info
   title

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1. Note.

   To set up the detection zone one has to use road's reference points with familiar topographic parameters.

2. Click

   «OK»

   OK to save the changes and close the dialog window Zone position setting

   (Fig

   .

   7.7—5)

3. Click

   «Apply»

   Apply to save the changes (

   Fig. 7.7—3,

   2).

Zone position setup is completed.